Eochaid of Eire

Eochaid Ua Conchobair of Ulaidh (17 June 1066-), also known as Haughey O'Connor of Ulster in English, was a nobleman of Ireland and the first son of King Einri of Eire and Queen Orlaith of Eire.

Biography
Eochaid was born in Gartan, Tyrconnell (now in County Donegal, Ireland) on 17 June 1066, the first child of Earl Einri of Tir Chonaill and Countess Orlaith of Tir Chonaill. He belonged to the Clan O'Connor of Tyrconnell, a powerful Irish clan, and he was granted the Earldom of Ulster (Ulaidh) while he was still an infant. Eochaid came of age in 1083, becoming the ruler of the region at the age of 17. As the eldest son of Earl Einri, he was groomed to be his father's heir.